Lifting-jack.



H. H. HASELTON.

LIFTING JACK.

APPLICATION FILED MAY a. 1916.

Patented Mar. 27, 1917.

w vbweooeo TATE HALSEY I-I. HASELTON, 0F HASELTON, NEW YORK.

LIFTING-JACK.

Specification of Letters Patent.

Patented Mar. 27, 1917.

Application filed May a, 1916. Serial No. 95,202.

To all whom it may concern:

Be it known that I, HALsnY H. HASEL- TON, a citizen of the UnitedStates, residing at Haselton, in the county of Essex, State of New York,have invented a new and useful Lifting-Jack; and I do hereby declare thefollowing to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it appertains tomake and use the same.

This invention relates to a new and use ful lifting jack, and an objectof the invention is to provide a simple, efficient, practical andimproved device of this kind for raising heavy commodities step by step.

Another object of the invention is the provision of a device of thiskind involving improved features of construction.

One of the features of construction is the provision of a standard orupright having an integral base, which is rigidly reinforced relative tothe standard and secured upon a platform, and having a lever pivoted atits upper end, to engage under the commodity to be elevated or raised,there being a pivoted lever mounted upon the platform and having aroller to engage under the first lever, whereby upon moving the secondlever the first lever will be gradually raised upon its pivot.

Another feature of the invention is the provision of a ratchet means tohold the second lever in different adjusted positions, there being astop on the first lever to be engaged by the roller for limiting thesecond lever in its movement.

In practical fields the details of construction may necessitatealterations, falling within the scope of what is claimed.

The invention comprises further feature, and combination of parts, ashereinafter set forth, shown in the drawings and claimed.

In the drawings Figure 1 is a view in perspective of the lifting jackconstructed in accordance with the invention.

Fig. 2 is a view in side elevation of the lifting jack, showing theratchet means and the abutment or stop.

Fig. 3 is a plan view of the structure shown in Fig. 2.

Fig. 4 is a view showing another form of ratchet means.

Referring more especially to the drawings, l designates the platform and2 a suitable standard or upright, which is provided with an integralbase 3 having an integral brace d between the base 3 and the upright.The base 3 is secured by means of bolts or the like 5 to the platform 1.By means of a pivot 7 a lever 6 is pivotally united in the forks Sat theupper end of the upright or standard 2. The lever 6 in its normalposition inclines downwardly as shown clearly in Fig. 1. Secured on thebase 1 by means of a bolt 9 is an angle plate 10, to the vertical ear 11of which a lever 12 is pivoted by means of a pivot 13. The lever 12engages the side of the lever 6, and is provided with a lateral pin lel,on which a roller 15 is journaled. This roller 15 engages under thelever 6, so that by moving the lever 12 on its pivot in the direction ofthe arrow a, said roller 15 rides against the under edge of the lever 6,thereby elevating the same, which in turn will raise any suitablearticle .or the like that may be supported thereon. In Fig. 2 a largerangular plate 16 is secured upon the platform 1 by means of the bolts17. The upright portion 18 of the angular plate 16' has its edgeprovided with a plurality of ratchet teeth 19, which are to be engagedby the spring pressed pawl 20 (which is pivoted at 21 to the lever 12)so that when the lever 12 is moved upon its pivot 22, the pawl will actto hold said lever in different adjusted positions. Projectingdownwardly from the upper edge of the lever 6 is an abutment lug or stop23, which is to be engaged by the roller 15, when the lever 12 is movedto the position shown in Fig. 2. When lifting or raising anarticle, thesame is placed upon the lever 6, when it is disposed as shown in Fig. 1,subsequently to which the lever 12 may be moved in the direction of thearrow a, in which case the lever 6 may be moved to the position shown inFig. 2 thereby raising or lifting. the commodity or article on the lever6. In Fig. 4 the roller 15 is eliminated, and in lieu thereof alaterally extending lug 24 is provided, to engage and ride over theteeth 25 on the under edge of the lever 6, so as to insure holding thelever 12 in adjusted positions.

The invention having been set forth what is claimed as new and useful isIn combination, a platform, an upright mounted thereon at one end, alever pivoted to the upper end of the upright, a segment toothed rack onthe platform at the opposite end to the upright, said lever having aseries of ratchet teeth extending from a point substantially directlyover the segment toothed rack toward the free end of the lever andprovided with a stop lug at the point from which the teeth extend, asecond lever pivoted to the segment toothed rack and provided withspring tensioned pawl to cooperate with the teeth of said segment andprovided with a lateral lug disposed on the second lever at a pointsubstantially corresponding to the height of said standard, to ride overthe teeth of the Copies of this patent may be obtained 1'91 five centseach,

first lever to engage any one of said teeth to hold the first lever indifferent positions, and to take the strain oil the second lever and itsspring tensioned pawl, the stop lug acting to limit the second leverWhen contacted with by the second lug.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

HALSEY H. HASELTON;

Witnesses:

GRAZIA G. HAsnLToN, GLADYs G. HAsEL'roN.

by addressing the Commissioner of Iatents,

Washington, I). G.

